Friday, January17, 2020
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Marine Weather and Tides
Topsham, ME

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:08AMSunset 4:31PM Friday January 17, 2020 2:16 PM EST (19:16 UTC) Moonrise 12:40AMMoonset 12:22PM Illumination 50% Phase: Third Quarter Moon; Moon at 22 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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ANZ153 Casco Bay- 1222 Pm Est Fri Jan 17 2020
.gale warning in effect until 6 pm est this evening...
.freezing spray advisory in effect through late tonight...
Rest of today..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 3 ft. Light freezing spray.
Tonight..NW winds 10 to 20 kt. Gusts up to 30 kt in the evening. Seas 1 to 2 ft in the evening, then 1 foot or less. Light freezing spray.
Sat..N winds up to 10 kt, becoming se in the afternoon. Seas 1 foot or less. Light freezing spray in the morning. Snow likely in the afternoon with vsby 1 to 3 nm.
Sat night..SE winds 5 to 10 kt with gusts up to 20 kt, becoming ne after midnight. Seas 2 to 4 ft. Snow. Rain likely after midnight. Vsby variable to less than one quarter nm.
Sun..W winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 2 to 3 ft. A chance of snow in the morning. Vsby variable to less than one quarter nm in the morning.
Sun night..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft. Light freezing spray after midnight.
Mon..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 1 to 2 ft. Light freezing spray.
Mon night..N winds around 10 kt with gusts up to 20 kt. Seas 1 to 2 ft. Light freezing spray.
Tue..NW winds around 10 kt with gusts up to 20 kt. Seas around 2 ft. Light freezing spray.
Tue night..N winds 5 to 10 kt. Seas 1 to 2 ft. Light freezing spray.
ANZ100 1222 Pm Est Fri Jan 17 2020
Synopsis for stonington me to merrimack river ma out to 25 nm.. A cold northwest wind will continue through the day today as low pressure exits into the maritimes. High pressure moves in from the west early Saturday. The next low pressure system tracks through the gulf of maine Saturday night into Sunday. High pressure will build across the waters early next week. &&


7 Day Forecast for Marine Location Near Topsham, ME
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location: 43.92, -69.96     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 171726 AAC AFDGYX

Area Forecast Discussion . UPDATED National Weather Service Gray ME 1226 PM EST Fri Jan 17 2020

SYNOPSIS. Low pressure track northeast of the Canadian Maritimes today and tonight. Northwest continues today with cold air continuing to flow into the area through tonight. The next storm system arrives Saturday night into early Sunday with more accumulating snow likely for much of the area. Cold high pressure builds in for the beginning of next week.

NEAR TERM /UNTIL 6 PM THIS EVENING/. 1225 PM Update . Temperatures were lowered slightly for several locations as we struggle to make much headway in cold air advection today. Winds are still quite gusty between a strong pressure gradient with low pressure to our north and vigorous mixing. Temperatures have come up enough to be out of wind chill advisory danger for all but the highest peaks. Will be evaluating this threat once again for later this evening before winds drop off.

910 AM Update . Have updated to remove the wind chill advisory and wording from products. Temperatures have increased enough over the north country to do so with wind chills around -10 to- 15F for the most part this hour. Otherwise made some minor adjustments for current thermal trends.

625 AM . Added patchy blowing snow through early afternoon to the whole CWA. Reports are the usual roads near open areas are getting snow covered in the wind. I think the wind will surge a bit higher this morning, but should come down gradually after midday. Otherwise, just the usual adjustment based on current obs for the next few hours.

Previously . Strong pressure gradient will persist across the CWA today as sfc low continues to deepen to our east, and strong high pressure /~1050 mb/ slowly creeps in from the west. This will keep the NW winds going today, gusting to 30-35 mph, especially this morning. This combines with continued strong CAA will produce highs from 5-10 above in the mtns, and around 20 in the S, but daytime wind chill will range from -10 to -15 in the N to around zero in the south. Still, should see mainly sunny skies, even in the mtns by this afternoon.

SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/. The sfc high, although weakening a bit, will shift in from the west tonight. Lows tonight will depend on how quickly decoupling occurs, as there will likely be some NW boundary layer flow through the evening, so may not see full a full rad cooling with fairly fresh snow cover, but still, the second half of the night should push the entire CWA close to or below zero, with lows in the mtn valleys possibly closing in on -20 F.

Light flow early Sat will shift to the S-SE in the afternoon, and will see clouds thicken and lower from the SW, with snow developing mid-late afternoon across all of NH and possibly wrn ME. The heaviest snow will likely hold off until after sunset. Highs will be in the teens N, to low-mid 20s S, and will likely not change too much during the afternoon.

LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/. *** Widespread snowfall expected Saturday night ***

A progressive pattern looks to set up over North America for the next week. Looking to our west we can see the start of what will become Saturdays storm forming. A broad open leaf is visible on water vapor imagery over Colorado. This will combine with the short wave moving out of the Oakanagan valley of BC with pressure falls currently observed over eastern North Dakota.

By Saturday afternoon expect a robust low pressure system over the Great Lakes starting to spread a cloud shield into western New England. This low pressure will rapidly cross southern Ontario and then northern Maine Saturday night into Sunday as it begins to occlude.

With cold high pressure in place before the arrival of the storm expect a strong coastal front to set up as the storm approaches keeping all of the land areas below freezing with only the NH seacoast at risk for mixing. Snow will move in rapidly Saturday evening. Forecast soundings show strong upward motion through the snow growth region from 00Z-06Z Sunday, and we may see snowfall rates of 1"/hr+ during this time. With the progressive nature of the system the intense snowfall rates won't last long, limiting the accumulation. Overall expect the snow accumulations to remain right around the 6" warning threshold, with the highest confidence of exceeding that from Portland to the Lakes Region of NH and back through the Maine foothills and Augusta. Across southern NH the warming trend aloft may decrease snow ratios, while in far northern NH the CT Valley will likely be shadowed on the front side of the system. With totals hovering right around the Winter Storm Watch threshold have opted to hold off on a Watch for this update in hopes that time will allow for a better idea of the focus of the heaviest snowfall.

By Sunday morning we'll already see the backside of the system moving in. As conditions dry out aloft expect a brief period of Freezing drizzle on Sunday morning before the precipitation is able to completely come to an end. By Sunday afternoon increasing W to NWly flow will bring wind gusts to around 25-30mph across the region as the low continues to intensify and move into the maritimes.

As we move into the start of next week a very cold air mass will move south out of Canada. Arctic front will cross the region on Tuesday with snow squalls possible along the leading edge. sub zero low temperatures will drop right to the coast.

AVIATION /18Z FRIDAY THROUGH WEDNESDAY/. Short Term . Some lingering MVFR in the mtns and at RKD through sunrise, but should be mainly VFR thru much of Saturday. NW wind gusts in the 25-30 kt range are still possible through today.

Long Term . Snow will move in Saturday afternoon in western NH and quickly cross into ME. Expect conditions to rapidly deteriorate to IFR in snow with IFR possible at times. Conditions will improve as quickly as they dropped with VFR returning to all but the mountains. Upslope snow showers will keep the mountains in MVFR through the end of the weekend. Cold high pressure builds in for the start of next week.

MARINE. Short Term . Gales continue through much of the today as pres gradient holds, but begins to slacken this afternoon. Expect some moderate freezing spray this morning, and the again this evening. Winds gradually diminish tonight, but will likely need SCA overnight, with sub-SCA conds on Saturday.

Long Term . Another storm will cross the waters on Saturday night with rain and snow showers. Cold northwesterly flow will move in behind the system on Sunday with Gales possible. High pressure builds in for the start of next week.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . None. MARINE . Freezing Spray Advisory until 6 AM EST Saturday for ANZ150>154. Gale Warning until 6 PM EST this evening for ANZ150>154.



NEAR TERM . Hanes SHORT TERM . Cempa LONG TERM . Curtis


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 24 mi53 min 14°F 38°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 29 mi27 min NNW 27 G 33 16°F 41°F3 ft1030.8 hPa (-0.8)1°F
44032 - Buoy E0104 - Central Maine Shelf 35 mi73 min NW 23 G 31 16°F 44°F5 ft1028.2 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wiscasset Airport, ME14 mi24 minVar 610.00 miFair14°F0°F51%1031 hPa
Auburn-Lewiston, ME20 mi21 minNW 16 G 2210.00 miFair12°F-5°F46%1032.7 hPa

Link to 5 minute data for KIWI

Wind History from IWI (wind in knots)
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1 day ago43Calm3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE4E6NE43NE4NE44536
2 days agoE4E3E4E7E4NE3NE3Calm3CalmCalm3CalmCalmW3N3CalmCalmCalmCalmCalm--SW44

Tide / Current Tables for Brunswick, Maine
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Brunswick
Click for Map
Fri -- 02:17 AM EST     -0.23 feet Low Tide
Fri -- 06:37 AM EST     4.13 feet High Tide
Fri -- 07:10 AM EST     Sunrise
Fri -- 08:00 AM EST     Last Quarter
Fri -- 11:21 AM EST     Moonset
Fri -- 02:51 PM EST     -0.00 feet Low Tide
Fri -- 04:29 PM EST     Sunset
Fri -- 07:03 PM EST     3.95 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50-0.201.22.83.94.13.93.42.71.91.10.50.100.72.13.43.93.83.52.92.1

Tide / Current Tables for Upper Hell Gate (Sasanoa River, Maine) Current
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Upper Hell Gate (Sasanoa River
Click for Map
Fri -- 01:49 AM EST     0.00 knots Slack
Fri -- 04:40 AM EST     1.09 knots Max Flood
Fri -- 07:09 AM EST     Sunrise
Fri -- 08:00 AM EST     Last Quarter
Fri -- 08:44 AM EST     -0.00 knots Slack
Fri -- 10:50 AM EST     -0.91 knots Max Ebb
Fri -- 11:21 AM EST     Moonset
Fri -- 02:20 PM EST     0.00 knots Slack
Fri -- 04:29 PM EST     Sunset
Fri -- 05:03 PM EST     0.95 knots Max Flood
Fri -- 09:00 PM EST     -0.00 knots Slack
Fri -- 11:13 PM EST     -0.98 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.30.10.611.10.90.80.4-0.2-0.7-0.9-0.7-0.4-0.10.30.80.90.90.70.50-0.6-1

Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Gray/Portland, ME (14,3,4,5)
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Ground Weather Radar Station Portland, ME
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